I told her she was insane to think we were in love and that I had wanted her to move in. Which inspired a lot of tears and hand-wringing, and promises that no one would ever love me like she did, and I would regret this decision for the rest of my life, karma would see to that.
She asked me for a week to move out, and I said she had the weekend to be out (It was a Thursday). I stayed at a friend's place over the weekend. Surprisingly enough, she was gone by Monday. She took some of my books and records, and left a little note saying it was "recompense" for the emotional trauma I was putting her through. I didn't want to press the issue so I just left it at that. Last I heard from here was a month or so later, she sent me a letter with a picture of her and her new boyfriend, telling me how much better he was than me, and how he was more of a man than I could ever hope to be. Apparently I'd thrown away the best thing that would ever happen to me. That was it. Never heard from her again.